Warp knitting machine



Aug. 24,` A152154 J, MERKEL 2,687,027

WARP KNITTING MACHINE Filed NOV. 29, 1951 Patented Aug. 24, 1954 UNITED STATES PATENT CFFICE Claims priority, application Germany December 5, 1950 8 Claims.

The subject of the present invention is a warp knitting machine, which operates with hooked needles and a press for closing these needles.

In the known warp knitting machines of this kind, the sinkers and the press are generally separately mounted and are also separately driven. This requires twice the number of all mounting and driving parts. lConsequently such a warp knitting machine is not only expensive, but also is not easily inspected. With regard to this separate mounting of press and sinkers, the relative adjustment vof press, sinkers and hooked needles over the whole length of the machine. isalso difficult.

In contrast to the above-mentioned known warp knitting machines, in the warp knitting machine according to the invention a presser is' secured on the sinker bar in addition to the sinker leads, said presser being adjustable on the sinker bar in the pressing direction. There isv thereby obtained an apprecably simplied construction, since the whole of the holding means for the presser and its eccentric drive are dispensed with. This appreciably simpiied construction is favourable not only with regard to the cost of production of such a machine but also with regard to its operation. Apart from a reduced power demand there is the advantage of good inspection, and rapid and convenient adjustment, particularly for regulating the pressure of the press.

In this connection it may be mentioned that a warp knitting machine is also known in which the sinker carrier projects outwardly over the sinker and in which the leading edge of this sinker` carrier, made from steel, is constructed as a press. This construction, in which the mounting and driving parts are indeed likewise saved, has important disadvantages; the press, made from steel, results in appreciable wear of the needles, whilst exact adjustment of the presses over-the whole length of the machine is hardly possible. Relative adjustment between sinkers and press is impossible, so that upon displacement of the press the sinkers are also necessarily moved, which is not required. With this above-mentioned construction moreover, for obtaining a uniformly good pressing point only sinkers without noses for closing the stitches can be employed.

In the accompanying drawing is illustrated a constructional example of the invention..

Fig. 1 shows a vertical section through a warp knitting machine (a double warp knitting machine) on line I-I of Fig. 3,

Fig. 2 shows parts of Fig. 1 on a larger scale,

Fig. 3 is a plan view of the machine, and

Fig. 4 is a front elevation taken in directionl of the arrow IV in Fig. 2.

In the drawing, the centre of the machine is indicated by the centre line a, on both sides of which the double Warp knitting machine is symmetrically constructed. In Fig. 1 essentially only the right-hand part of the machine is shown with its essential working parts. I shows the hooked needles (point needles), 2 the eyed needles, 3 the presses, 4 the sinkers, 5 the sinker leads, S a sinker bar and l a swinging arm mounted on the driving shaft, not shown, to the anges 8 of which the sinker bar G is secured.

According to the invention there is secured to this sinker bar t, in addition to the sinker leads 5, a presser 3, which is arranged on the sinker bar so as to be adjustable in the press direction A. For this purpose set screws 9 are :arranged on the sinker bar, which actat I!) on the back oi the presser and constitute adjusting means for adjusting the position of the presser.

As is apparent from the drawing, the sinker bar G has substantially a horizontal 'iF-shaped cross-section. Through the upper flange 3a of this cross-section are screwed the set screws 9, whilst on the shank 5b are arranged sinker leads and pressers 3 directly one upon the other, and the sinker leads are secured from beneath by screws l I. Independently therefrom the pressers 3 are secured from above by screws l2. These screws I2 have suicient play in the screw holes of the pressers 3 i'or the adjustment in direction A.

In order to achieve exact and uniform adjustment of the pressure of the pressers 3 on the needles I, and indeed over the whole length of the machine, according to the invention, the presser 3 is divided longitudinally into a plurality of pieces, the length oi" which pressure pieces can amount to about 30 cm.

As further appears from the drawing, the pressers are provided with undercut slots I3 into which the sinkers l project so that, according to Fig. 2, the press point b may be set lower, i. e. to obtain the most favourable press point at which the presser rubs the needle at low pressure, i. e. presses the needle point Ia into a groove Ill provided in the needle. This favourable lowlying press point b and the therewith associated low pressure are important for low needle wear. In contrast to the above-mentioned steel presses this wear is also appreciably reduced in that the pressers 3 employed with the new warp knitting machine described consist of synthetic resin. Worn pressers can at once be removed after releasing the screws I2 for grinding of the pressing edge 3a.

The advantages obtained with the invention can be realised at once from the drawing.

By the saving of special mounting and driving parts for the pressers the machine is appreciably simpliiied. There is provided good and convenient capability of adjustment of the pressers for regulating the pressure, so that not only does the new warp knitting machine provide faultless goods, but also the wear is reduced to a minimum by very exact adjustment of the pressure.

A further advantage oi the new construction according to Figs. 1 and 2 is that sinkers having noses 4a for closing the stitches can be used. In spite of these elevated noses due to the undercut slots i3 of the presser 3 a favourable pressing point b` is obtained.

When the needles move to their lowest point, the noses fia hold back the stitches formed in the preceding operation so that the needles can be moved upwardly again without influencing the position of the stitches held by the sinker noses do.. After the following stitch or loop forming operation, the needles are again downwardly moved, and the sinker noses 4a separate the newly formed loops from the old loops. These two functions of the sinker noses assure a very reliable operation of the machine.

V/'hat I claim is:

1. A warp knitting machine comprising hooked needles, a sinker bar and sinker leads on said sinker bar, a presser secured on said sinker bar and adjustable thereon in the pressing direction and adjusting means mounted on said sinker bar engaging said presser.

2. A warp knitting machine comprising hooked needles, a sinker bar and sinker leads on said sinker bar, a presser secured on said sinker bar and adjustable thereon in the pressing direction, and set screws carried by said sinker bar and engaging the back of the presser.

3. A warp knitting machine comprising hooked needles, a sinker bar and sinker leads on said sinker bar, and a presser mounted on said sinker bar and adjustable thereon in the pressing direction, said sinker bar having a cross section which is of substantially horizontal T-shape, said set screws being screwed into the upper arm of the T, and said sinker leads and presser being directly superimposed and arranged on the shank of the T, and being separately secured by screws from beneath and from above respectively.

4. A warp knitting machine comprising hooked 5 Number needles, a sinker bar and sinker leads on said sinker bar, presser means mounted on said sinker bar and adjustable thereon in the pressing direction, said presser means being divided longitudinally into a plurality of pressers, and set screws carried by said sinker bar and engaging said pressers for adjusting the same.

5. A warp knitting machine comprising hooked needles, a sinker bar, sinkers and sinker leads on said sinker bar, and a presser secured on said sinker bar and adjustable thereon in the pressing direction, said presser having undercut slots into which the sinkers project.

6. A warp knitting machine comprising hooked needles, a sinker bar having a horizontal portion and an upwardly projecting wall portion, sinker leads and a presser directly superimposed and arranged on said horizontal portion, said presser being divided longitudinally into a plurality of parts and being formed with slots into which the sinkers project, set screws screwed into said upwardly projecting portion of said sinker bar and engaging the back of the presser, screws separately securing said sinker leads and presser parts to said sinker bar, and sinkers provided with noses for holding back the stitches.

7. A Warp knitting machine comprising in combination, hooked needles, a sinker bar having a horizontal portion and an upwardly projecting wall portion, superimposed sinker leads and presser means located on said horizontal portion of said sinker bar, means independently securing said sinker leads and said presser means to said sinker bar, and set screws screwed into said upwardly projecting portion of said sinker bar and engaging said presser means for adjusting the same in the pressing direction.

8. A warp knitting machine, comprising hooked needles, a sinker bar, sinkers and sinker leads secured to said sinker bar, a presser mounted on said sinker bar and adjustable thereon in the pressing direction, said presser being formed with undercut slots into which said sinkers project, said sinkers having noses for holding the stitches.

References Cited in the rile of this patent UNITED STATES PATENTS Name Date Campion Dec. 20, 1881 Saupe Feb. 25, 1936 Loimann Jan. 5, 1937 FOREIGN PATENTS Country Date Germany Oct. 30, 1937 Number 

